{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["machine or equipment", "engineering feature", "application", "enabling technology", "concept or principle", "process parameter"], "input": "A small amount of Ti alloy was melted when the first layer of Al alloy was deposited due to the low heat input ."}
{"machine or equipment": [], "engineering feature": [], "application": [], "enabling technology": [], "concept or principle": ["melted", "heat"], "process parameter": ["layer"]}